Improvement in millstone-eyes



{ F. G'. WAL'LAcE.

MILLsToNE EYES.

N. PETERS. PNoTmLITHoGRAPMER WASHINGTON D c UNITED TES FERRAND G.WALLACE, AOF RIPON, WISCONSIN.

Specification forming partof Letters Patent No. 187,204, dated February6,1877 application filed January 18, 1876.

To all whom it may concern Beit known that I, FERRAND G. WALLACE, ofRipon, in the county of Fond du Lac and State of Wisconsin, haveinvented certain new and useful improvements in Millstone- Eyes, ofwhich the following is a specication:

This invention relates to certain improvements in that class ofmill-trams in which the bed-stone is set upon a universal or rockingjoint, so as to enable the same to adjust itself' perfectly t0 the faceof the runner; and its object is to provide for the proper rocking oroscillating movement ofthe bed-stone in a more perfect manner thanheretofore, and also to allow the spindle to rotate properly, and at thesame time prevent the escape of flour or dust through the eye of thebed-stone, and between said bed-stone and its skirting.

The invention consists, first, in a packing device for therunner-spindle, consisting of an annular plate attached to the bed-stonewith an upwardly-projecting collar around its central opening, and anannular plate provided with a flexible or pliable packing-disk attachedto the spindle, and having a recess on its lower face, in such manner asto set over and work l loosely upon the plate attached to the bed-`stone, as more fully hereinafter set forth.

Second, the invention also consists of a rubber ring fitted between theedge of the stationary lower stone and the surrounding case,substantially on a line with the upper surface of said stone, as will bemore fully herein described and shown.

Third, in the combination, with the bed-stone and the skirting, of twoor more angle-irons attached to the skirting, at a slight distance fromthe bed-stone, between which can be se-v cured suitable wedges to holdthe bed-stone in position, as hereinafter more fully set forth.

In the drawing, Figure 1 represents a view, partly in elevation andpartly in section, of my improved apparatus. Fig. 2 represents avertical section through the center of the same. Fig. 3 represents aview of the upper face of the bed-stone and the packing-plate attachedthereto. Fig. 4 represents a view of the lower face of said bed-stonewith the spindle and its bushing removed. Fig. 5 represents a detachedview of the packing-plate secured to the spindle; and Fig. 6 a top Viewof a portion of the bed-plate upon which the bed-stone is supported,with the bushing and spindle secured to the same.

The letter A represents the bed-stone, having secured to its lower facean annular plate, B, around -the aperture, and on the lower side ofwhich is formed an annular rounded shoulder, b. The bed or supportingplate is represented by the letter c, and is provided with an apertureat its center for the reception of the bush D of the bed-stone, andaround the upper edge of said aperture with a rounded groove or recess,c', in which the rounded shoulder b on the plate B sits, when the stoneis in position, forming a ball-andsocket or universal joint for thestone, which will allow of a proper rocking or oscillating motion to thesame. The letters b b represent lugs or ears formed on opposite sides ofthe lower face of the plate B, which sit in correspondingly-shapedrecesses c in the bedplate c, and prevent the bed-plate from rotatlhespindle is represented by the letter E, and extends up through the bushD, which is secured in the lower part of the eye of the bed-stone, asusual. The upper part of said bush is made tubular in shape, the insideof the tubular portion being provided with three radial recesses, e, forthe reception ot' the adjustable bearing-blocks e', which are beveled atthe rear sides, and are confined in place by the wedges e, which areadjustably secured in the recesses by means of the screws 6 passingvertically through them and into the body of the bushing. G representsan annular plate, secured in a recess around the upper edge of the eyeof the stone, iush Awith its upper face. lar apertures, through whichthe screws 6 may bev reached, for adjusting the bearingblocks.

The letter H represents an annular plate secured to the annular plate G,or to the top of the bedstone, and provided with an annular shoulderaround the central opening on its upper face. The openings through bothplates G and H are of sufficient size as to sit loosely l around thespindle F. The letter I represents an annular plate, consisting of twoannular plates of metal, I1 and l2, with an interposed Said plate isprovided with three circudisk of flexible material, I3, such as rubberor leather, which hugs the spindle closely. The lower plate I2 forms adownwardly-projecting annular rim, which sits loosely over theupwardly-projecting rim around the central opening in the plate H, thetwo sliding upon each other and preventing the escape of flour,

and at the same time allowing of the free lateral movement of the plateI, the exible disk forming part of the same, providing for the rockingmotion of the bed-stone, and preventing the plate I from being lifted asthe said bed-stone oscillates. The letter K represents the bridge orbalance-rynd sitting in the eye of the runner A in the usual manner, bywhich the runner is supported upon the spindle.

Ihe letter L represents the skirting of the lower stone, and M anannular elastic packing of rubber, canvas, or other suitable mate rial,secured around the inside of said skirting in a suitable groove for thepurpose, to prevent the escape of lour between the bed-stone andskirting. v'

The letter N represents a band secured around the lower edge of therunner, and prowith one or more wings or flights, O,- sitting in thespace between the runner andthe hoop or casing P, to carry the our ormeal to the discharge-spout R-Fig. 2of the drawing.

As thus constructed it will be perceived that the lower stone is free tooscillate or rock to acl commodate or adjust its face to the face of therunner, and by means of the packing-plates I1, I, I3, and H, workingclosely in contact with each otherfall escape of meal or lour throughthe eye of the bed-stone will be prevented, and

f the packing around the skirting will prevent the escape of flour atthat point.

By means of the adjustable bearing-blocks and the wedges the bed-stonecan be readily adjusted in relation to the spindle, and by means of theflights or wings attached to the band around the runner the meal orflour, as

ground, is delivered to the spout, and its discharge insured thereby,preventing the clogging of the stones, as sometimes happens.

The letter S represents a series of two or more an gle-ir'ons secured tothe skirting about one inch from the bed-stone, and T a series of keysdriven between said irons and the sides of the bed-stone, to assist inkeeping it in position and prevent it from rocking over so as to pulldown the packing M, which would `to operate substantially as described.

2. The rubber ring fitted between the edge of the stationary lower stoneand the surrounding case, substantially on a line with the upper surfaceof said stone, the whole being combined for operation essentially as setforth.

3. In combination with the bed-stone and lthe skirting two or moreangle-irons secured to the skirting at a slight distance from FERRAND G.WALLACE.

Witnesses: v

LEwIs A. DoUBY, JEROME H. HOWARD.

